Shuttle for sewing-machines



(N0 Model.)

P. DIEHL & W. BRANDT. SHUTTLE FOR SEWING MACHINES. No. 435,924 Patented Sept. 9, 1890.

(2 Tommi;

UNITED STATES PATENT OFFICE.

PHILIP DIEIIL AND YVILLIAM. BRANDT, OF ELIZABETH, NE JERSEY, AS- SIGNORS TO THE SINGER MANUFACTURING COMPANY OF NE\V JERSEY.

SHUTTLE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 435,924, dated September 9, 1890.

Application filed March 31, 1890- Seria1No.34=6,005- (N model.)

To aZZ whom it may concern.-

Be it known that we, PHILIP DIEHL and WILLIAM BRANDT, citizens of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, haveinvented certain new and useful Improvements in Sewing-Machine Shuttles, of which the following is aspecification, reference being had therein to the accompanying drawings.

In that class of oscillating and rotating sewing-machine shuttles in which the bobbins are concentric with the motions of the shuttles the latter are not usually removed from the machines when they are to be newly supplied with thread, the bobbin-case and bobbin only being removed for this purpose.

Our invention has for its object to provide sewing-machine shuttles of the class referred to with bobbin-cases which can be conveniently and readily removed from the shuttles or inserted in place and when in Working position will be securely locked relative to the shuttles. To this end the central bobbin-case supporting-pin of our improved shuttle has near its outer end an annular recess, forming a neck, outside of which is a head, the outer face of which is preferably conical or tapering. The outer face of the bobbin'case is recessed for the reception of a spring-pressed latch having an opening to permit of the passage of the head of the said pin anda smaller part to receive the neck of the pin when the said head has passed through the said latch and the latter is forced by its spring into holding engagement with the pin. The outer face of the bobbin-case is also preferably provided with a thumbnail notch or recess, and the latch is preferably undercut at its side or end opposite said recess to receive a fingernail, so that the operator can conveniently get hold of the said bobbin-case and latch to release the hold of the latter in removing the bobbin-case from the shuttle, and can also readily hold the bobbin-case when removed or when inserting it in place in the shuttle when the latter is in the machine.

In the drawings, Figure 1 is an outer face view of our improved shuttle with the bobbin-case in place. Fig. 2 is a cross=section of the same on line 2 2 of Fig. 1, and Fig. 3 is a detail view of thelocking-latch and its spring. Figs. 4., 5, and 6 are views similar to Figs. 1, 2, and 3, respectively, illustrating a slight modification.

A denotes the body of the shuttle, and ais the bobbin-case supporting-pin, provided near its outer end with an annular recess a, forming a neck, outside of which is the head (L The outer face of said head is preferably tapered by being formed frnsto-conical, as in Figs. 1 and 2, or rounded, as in Figs. at and 5.

B is the bobbin-case havinga central sleeve b, fitting over the pin a of the shuttle, said bobbin-case having in its outer face a recess 0 to receive a locking slide or latch (1, provided with an openin g e of proper size to permit of the passage of the head a of the said pin a, the said opening being made smaller at one end, so as to engage the neck or reduced part of the pin ct, formed by the annular 7o groove a. The recess 0, receiving the slide or latch d, is undercut, as denoted by dotted lines in Fig. 1, to hold the said slide or latch in place, and the latter is preferably pressed outward or into engagement with the pin a by a small coil-spring f, housed in a recess in the outer or face wall of the bobbin-case and pressing on a lug or projection g of the said slide or latch, the outward movement of the latter being limited by a small stop pin or 8o screw h, movable in a hole or slot 1' in the outer facewvall of the bobbin-case. This stopscrew thus retains the said slide or latch in place when the bobbin-case is removed from the shuttle.

A thumb-nail notch or recess j is prefer ably formed in the outer face of the bobbin case opposite the inner end of the slide or latch d, and the outer end of the latter is preferably undercut at 70 to receive a finger- 9o nail, so that the operator, by inserting the thumb-nail in the notch j and the fingernail at the undercut point 7r, can press back the latch against its spring and disengage it from the head of the pin a, and can then pull the bobbin-case out of the shuttle, and is also enabled to readily hold it at all times in removing or inserting. By forming the head a of the pin a tapering, as above described, the bobbin-case, after its sleeve 11 has been enmo M V V tered by the said pin, may be forced into position simply by pressure on its outer face, such pressure causing the spring fto yield and the latch to ride over the tapered head until it is in position to snap into the recess a of the said pin, and thus lock the bobbincase in place. The pin a is at the center of the oscillating or rotating movements of the shuttle, and the bobbin-case supporting said pin is held stationary in the ordinary manner by the engagement of the horn or projection m on said bobbin-case with some stationary part of the bed-plate of the machine, the bobbin, (not shown,) being an ordinary disk-bobbin, closely filling the bobbin-case and turning on the sleeve 12 as its thread is unwound.

Instead of making the locking-latch in the form of a slide, as above described, it may be a pivoted latch, as d, Figs. 4, 5, and 6, which would be an obvious equivalent for the sliding latch, the said latch d being secured in place by and pivoted on the screw it.

We claim- 7 1. The combination, witha sewing-machine shuttle having at its center of rotation a pin provided near its outer end with an annular recess, of a bobbin-case supported by said pin and having in its outer face a recess and in said recess a locking-latch to engage said pin, said latch being located bodily in said recess and movable crosswise of the said face.

2. The combination, with a sewing-machine shuttle having at its center of rotation a bobbin-supporting pin provided near its outer end with an annular recess forming a neck,

and outside of said recess a head having a tapered outer face, of a bobbin-case supported by said pin and having in its outer face a recess, and a locking-latch located bodily in said recess and having an opening for the passage of the head of said pin, said opening being smaller at one end than at the other to fit the said neck.

3. The combination, with a shuttle A, having a pin a, provided near its outer end with an annular recess a, of abobbin-case having in its outer face a recess 0 and a thumb-nail notch' j, and a spring-pressed locking-latch arranged in said recess 0.

4. The combination, with a shuttle A, having a pin a, provided near its outer end With an annular recess a, of a bobbin-case having in its outer face a recess 0 and a thumb-nail notch j, and a spring-pressed locking-latch arranged in said recess a and having an un dercut outer side or end is.

5. The combination, with the shuttle A, having a pin a, provided near its outer end with an annular recess a, of the bobbin-case B, having an undercut recess in its outer face, and the spring-pressed sliding latch cl, arranged in said recess and provided with a stop, as pin or screw h.

In testimony whereof we affix our signatures in presence of two witnesses.

PHILIP DIEHL. WILLIAM BRANDT. Witnesses:

OHAs. ELKIN, WALTER J. PETTIT. 

